/Engine/Plugins/Experimental/PlatformCrypto/Source/PlatformCryptoTypes/Public/PlatformCryptoTypes.h
Get the amount of bytes required to safely store the output of a call to Update for a particular Plaintext value
The minimum amount of space required to successfully call Update with
int32 GetUpdateBufferSizeBytes ( const [TArrayView](API\Runtime\Core\Containers\TArrayView)< const uint8 > Plaintext ) const